html,
body,
div,
button,
img {
    margin: 0;
    padding: 0;
    border: 0;
    outline: 0;
    vertical-align: baseline;
    background: transparent;
    list-style: none;
    box-sizing: border-box;
    cursor: pointer;
}

html,
body,
#app {
    width: 100%;
    height: 100%;
    font-size: 16px;
    font-weight: normal;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    font-family: PingFang SC, Helvetica Neue, Helvetica, Hiragino Sans GB, Microsoft YaHei, Arial, sans-serif;
    min-width: 1200px;
}

img {
    display: block;
}

img[src=""],
img:not([src]) {
    opacity: 0;
}
